Joshua 4:2

And it came to pass, when all the people were clean passed over Jordan, that the LORD spake unto Joshua, saying,

And command ye them, saying, Take you hence out of the midst of Jordan, out of the place where the priests' feet stood firm, twelve stones, and ye shall carry them over with you, and leave them in the lodging place, where ye shall lodge this night.

Then Joshua called the twelve men, whom he had prepared of the children of Israel, out of every tribe a man:

And Joshua said unto them, Pass over before the ark of the LORD your God into the midst of Jordan, and take ye up every man of you a stone upon his shoulder, according unto the number of the tribes of the children of Israel: